/Engine/Source/Editor/MaterialEditor/Public/MaterialEditorModule.h
Delegates to be called to extend the material menus
typedef TBaseDelegate_OneParam< [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FExtender](API\Runtime\Slate\Framework\MultiBox\FExtender) >, const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FUICommandList](API\Runtime\Slate\Framework\Commands\FUICommandList) > > FMaterialMenuExtender